Sender Control of Acknowledgement Delays in QUIC
draft-iyengar-quic-delayed-ack-01

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QUIC                                                          J. Iyengar
Internet-Draft                                                    Fastly
Intended status: Standards Track                                I. Swett
Expires: 27 January 2021                                          Google
                                                            26 July 2020

            Sender Control of Acknowledgement Delays in QUIC
                    draft-iyengar-quic-delayed-ack-01

Abstract

   This document describes a QUIC extension for an endpoint to control
   its peer's delaying of acknowledgements.

Note to Readers

   Discussion of this draft takes place on the QUIC working group
   mailing list (quic@ietf.org), which is archived at
   <https://mailarchive.ietf.org/arch/search/?email_list=quic>.

   Working Group information can be found at <https://github.com/
   quicwg>; source code and issues list for this draft can be found at
   <https://github.com/quicwg/base-drafts/labels/-transport>.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on 27 January 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terms and Definitions . . . . . . . . . . . . . . . . . .   2
   2.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Negotiating Extension Use . . . . . . . . . . . . . . . . . .   4
   4.  ACK_FREQUENCY Frame . . . . . . . . . . . . . . . . . . . . .   4
   5.  Multiple ACK_FREQUENCY Frames . . . . . . . . . . . . . . . .   5
   6.  Sending Acknowledgments . . . . . . . . . . . . . . . . . . .   6
     6.1.  Response to Reordering  . . . . . . . . . . . . . . . . .   7
     6.2.  Expediting Congestion Signals . . . . . . . . . . . . . .   7
     6.3.  Batch Processing of Packets . . . . . . . . . . . . . . .   7
   7.  Computation of Probe Timeout Period . . . . . . . . . . . . .   7
   8.  Implementation Considerations . . . . . . . . . . . . . . . .   8
     8.1.  Loss Detection  . . . . . . . . . . . . . . . . . . . . .   8
     8.2.  New Connections . . . . . . . . . . . . . . . . . . . . .   8
     8.3.  Window-based Congestion Controllers . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   11. Normative References  . . . . . . . . . . . . . . . . . . . .   9
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .   9
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   This document describes a QUIC extension for an endpoint to control
   its peer's delaying of acknowledgements.

1.1.  Terms and Definitions

   The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

   In the rest of this document, "sender" refers to a QUIC data sender

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   (and acknowledgement receiver).  Similarly, "receiver" refers to a
   QUIC data receiver (and acknowledgement sender).

   An "acknowledgement packet" refers to a QUIC packet that contains
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